Affected Body Areas Research Articles

Factors Associated with Musculoskeletal Disorders among Regular and Special Education Teachers: A Narrative Review.

Musculoskeletal disorder (MSD) is a major health problem, which can lead to an enormous burden to the institution as well as chronic disability to the individual. Teachers are at risk of developing MSD due to the exposure to various ergonomic risk factors. Teachers of special education, for example, are expected to perform extra duty such as lifting and moving students, feeding food, changing diapers, and helping them in ambulation. Although there is an adequate amount of scientific research on MSD’s prevalence and its risk factors among regular teachers, only few studies have focused on special education teachers. This review aimed to address these gaps by describing the evidence from various papers on the prevalence of MSD among regular and special education teachers and the related risk factors. The papers have been gathered using electronic databases, including PubMed, Science Direct, Google Scholar, and Springer. The prevalence of MSD among regular teachers ranges from 48.7% to 73.7%, while the prevalence ranges from 38.7% to 94% in special education teachers. Risk factors, such as individual (age, duration of teaching, working hours, and work burden), physical (teaching activities, affected body areas), and psychological factors (stress, anxiety, fear), were identified. From the review, it is recommended to implement ergonomically designed workplaces, comprehensive ergonomic training, psychological approaches, and functional training among teachers at risk.

Musculoskeletal symptoms related to work environment - a report based on survey conducted among computer professionals

Introduction 
 Nowadays the computer has become an essential tool used at work in many vocations. Health effects resulting from sitting working are associated with taking the same position for a few hours every day. Although musculoskeletal disorders are widespread worldwide, they are typical for office jobs. Work related musculoskeletal disorders among the IT professionals are a common area of concern.
 Aim 
 This study aimed to determine the prevalence of various musculoskeletal symptoms among computer workers.
 Results and Conclusions 
 The survey was completed by 78 participants - 57 men (73,1%) and 21 women. Most participants (42,3%) were aged below 30 years. The musculoskeletal symptoms varied according to affected body area. Within the 7 days preceding the study, a substantial proportion of the participants reported lower back (44,9%), neck (43,6%), or shoulder (33,3%) symptoms. Almost one-quarter (23,1%) of the participants had upper back pain during the same period. Similarly, the same regions were the four most frequently affected in the 12 months preceding the study. Musculoskeletal symptoms were highly prevalent in the current sample. Prevention of the appearance and deterioration of symptoms is possible by following the rules of ergonomics at work with feedback regarding correct posture, frequently changing the position of the body with stretching exercises and taking active breaks.

Exome sequencing reveals the first intragenic deletion in ABCA5 underlying autosomal recessive hypertrichosis.

Hereditary hypertrichosis (HH) is characterized by excessive hair growth on various body areas, which is independent of the individual's age. This rare hair disorder has been classified by its origin (genetic or acquired), age of onset, breadth of hair distribution (universal or localized) and the affected body areas. HH is often linked to several additional congenital abnormalities involving teeth, heart and bones. Human HH is associated with heterozygous genomic duplications and deletions in the chromosomal region 17q24.2-q24.3, containing genes such as ABCA5, ABCA6, ABCA10 and MAP2K6. Recently, a homozygous splice-site variant in ABCA5 has been reported to cause autosomal recessive congenital generalized hypertrichosis terminalis (CGHT; OMIM 135400). To investigate the clinical and genetic basis of autosomal recessive hypertrichosis in a large consanguineous Pakistani family. In the present study, we characterized a family of Pakistani origin segregating CGHT in an autosomal recessive pattern, using whole exome sequencing followed by Sanger sequencing RESULTS: We identified a novel 2-bp intragenic deletion [NM_172232.4(ABCA5);c.977_978delAT] causing a frameshift variant (p.His326ArgfsTer5) in ABCA5. To our knowledge, this is the first intragenic deletion in ABCA5 underlying CGHT. The findings further validate the involvement of ABCA5 in hair development. The study will facilitate genetic counselling of families carrying CGHT-related features in Pakistani and other populations.

A Rare Cause of Chronic Leg Ulcer in Childhood: Parkes-Weber Syndrome.

Parkes Weber syndrome is a rare congenital vascular disease characterized by capillary venous, arterio-venous and lymphatic malformations accompanied by bone or soft tissue hypertrophy in the affected body area. Lymphatic insufficiency and venous ulcers may occur as a result of increased venous pressure, caused by arterio-venous shunts. Parkes Weber syndrome is an infrequent cause of leg ulcers in childhood. Since arterio-venous malformations can lead to serious complications, it is important to recognize and start treatment immediately.

Epidemiology of Pityriasis versicolor in Tunisia: Clinical features and characterization of Malassezia species

Malassezia (M.) genus includes commensal yeasts of increasing medical importance, as they result in many diseases, ranging from pityriasis versicolor (PV) to systemic infections. Previous studies reported geographical variations in distribution of Malassezia species in PV lesions. The aims of the current study were to define the clinico-demographic features of PV in Tunisia, to characterize Malassezia isolates using phenotypic and molecular techniques and to find out any association between species and clinico-demographic parameters.In total, 120 PV patients were enrolled in this study. Skin scrapings were collected and inoculated on Sabouraud agar and modified Dixon medium. Malassezia species were identified using conventional phenotypic methods and 26 s rDNA PCR-RFLP. The highest prevalence of PV was observed among young adults’ group. The most affected body areas were the back and neck. In overall, 50.8% and 35% of PV cases had pruritus and history of recurrence respectively. The overall concordance between phenotypic and molecular methods was high (80.95%). The discordant results are rather due to the presence of multiple species in a single culture than true misidentification. Using PCR-RFLP, M. furfur was the most isolated species (38.7%) followed by M. globosa (37.7%), M. restricta and M. sympodialis. No statistically significant association was noted between Malassezia spp. and clinico-demographic characteristics. Unlike many reports from temperate climate countries, M. furfur and M. globosa along together were the most frequently isolated species in Tunisian PV patients. Although phenotypic methods remain simple and cost-effective, molecular techniques are considered as fast and accurate methods for diagnosis purposes.

Injury Prevalence of the Lower Limbs in Handball Players: A Systematic Review.

Lower limb injuries are frequent in handball and a serious hindrance to athletic performance. The aim of this systematic review was to synthesize the available research on the prevalence of lower limb injuries in handball players according to sex and competitive level. According to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis, 19 studies were selected after a systematic search and selection process of three digital databases: Scopus, PubMed, and Web of Science. Furthermore, a study quality analysis using an ‘Extension for Sports Injury and Illness Surveillance of the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE-SIIS)’ was carried out. The sample consisted of 7110 male and female handball players registering 4483 injuries in their lower limbs. The results showed a high incidence of knee injuries (30.23%) and ankle injuries (24.80%), especially in the ligaments, such as the talofibular and the anterior cruciate ligaments. Considering sex and competitive level, knee injuries accounted for 47.02% of injuries among women, while among men, ankle injuries were most prevalent (34.22%) in international competitions. Additionally, the most common cause of injuries was trauma (85.61%). The findings highlighted that the prevalence of lower limb injuries varies greatly according to the characteristics of the sample and injury. Therefore, the study underlines the importance that sports practitioners (physical trainers, readapters, and physiotherapists) adapt training protocols to reduce injury incidence in the most affected body areas or tissues.

The Use of HSQoL-24 in an Assessment of Quality-of-Life Impairment among Hidradenitis Suppurativa Patients: First Look at Real-Life Data.

Hidradenitis suppurativa (HS) is a chronic inflammatory skin disorder with well-documented effects on patients’ quality of life (QoL). The aim of this study was to evaluate the QoL of patients with HS via the use of a newly developed questionnaire: Hidradenitis Suppurativa Quality of Life-24 (HSQoL-24). This study was performed on a population of 342 HS patients. Their QoL was assessed via the HSQoL-24 questionnaire. The perceived impairment of QoL due to HS in the studied group was considered to be serious (mean HSQoL-24 score: 58.3 ± 21.0 points). Women tended to experience a significantly higher impact from the disease than men (61.6 ± 19.2 points vs. 51.1 ± 23.1 points, p < 0.001). The HS severity had an effect on the perceived QoL, with statistically significant differences being evident between the self-assessed HS severity groups. The level of QoL impairment correlated positively with the number of affected body areas (r = 0.285, p < 0.001) and the duration of the disease (r = 0.173, p = 0.001), while the patients’ age at disease onset correlated negatively with the HSQoL-24 global score (r = −0.182, p = 0.001). Patients living in their family house scored higher than other groups. The least affected were patients who lived alone. The study shows that the HSQoL-24 questionnaire is a reliable, HS-specific tool for measuring the QoL among patients with HS in real-life clinical settings.

Flame burns.

Flame burns lead to significant long-term morbidity and functional consequences. This study analyzed the mortality-related factors in patients with flame burns to compare with the existing literature. This retrospective descriptive study was carried out at the General Surgery Clinic, Gazi Yaşargil Training and Research Hospital, Turkey, to include 131 patients admitted and treated with emergency surgery for flame burns between January 2016 and December 2019. Of the patients hospitalized for flame burn, 103 (78.6%) were male and 28 (21.4%) were female (M:F=3.6) with a mean age of 25.3 ± 20.78 years. The 15-34 years age group was the most affected by flame burns. The most frequently affected body areas were the upper extremities and face (n=68, 51.9%); conjunctivitis developed in 49 (37.4%) patients. The wound infection rate was 34.3%, and Staphylococcus epidermidis had the highest growth rate in wound culture results (24.4%). Flame burns were most common in winter and autumn. The majority of patients (n=95, 72.5%) were treated with escharectomy and dressing, while grafting was performed in 36 (27.5%) patients. A total of 3 (2.2%) patients died-one died in a suicide attempt, one due to inhalation burn after flame burn, and another died due to sepsis. The average length of hospital stay was 8.0± 3.9 days. Flame burns are much more common in young men, causing deeper and wider burns and requiring greater surgical intervention. This leads to frequent wound infections and longer hospital stays.

Evaluation of compensatory hyperhidrosis after sympathectomy: The use of an objective method

To investigate the prevalence of compensatory hyperhidrosis following videothoracic sympathectomy to treat palmoplantar hyperhidrosis and its effect on sweating in the chest, abdomen, back and thighs. Furthermore, to evaluate the concordance between a subjective and an objective method of assessment for compensatory hyperhidrosis. Forty patients with combined palmar and plantar hyperhidrosis who underwent video-assisted thoracoscopic sympathectomy (15 women and 25 men, with a mean age of 25 years) were prospectively followed for 1 year. Subjective and objective parameters were evaluated, using respectively a questionnaire and a sudorometer (Vapometer). In the subjective analysis, in the first month, only 10% of patients did not have compensatory hyperhidrosis, and 70% continued to report it at 1 or more sites after 1 year. In the objective analysis, 35% of the patients did not present compensatory hyperhidrosis after 1 month, and this number persisted stable, with 30% of patients remaining free of compensatory hyperhidrosis after 1 year. The most frequent area affected by compensatory hyperhidrosis was the back in both assessments. There was no positive concordance between the results of the objective and subjective analysis at any time in any of the 4 regions studied. Compensatory hyperhidrosis is a very common postoperative side effect after videothoracic sympathectomy, occurring early after the procedure and persisting for prolonged periods of time. The most frequently affected body area is the back, and no concordance between objective and subjective assessments was observed.

Musculoskeletal problems of hand-sewn crafted footwear manufacturing artisans in Kolhapur, India.

Kolhapuri hand-sewn crafted footwear is one of the well-designed and traditional footwear in India. Many of the processes in these industries are manual. The study was carried out to establish the occurrence of musculoskeletal disorders (MSD) in different body parts of artisans engaged in crafted footwear manufacturing activity. Due to the difficult physical activities carried out by artisans, there was a possibility of evolving different kinds of MSDs. To evaluate the prevalence of MSD symptoms in various body regions of crafted footwear manufacturing artisans. This work further aims to assess different working postures. The existing working environment and the occurrences of MSD indications of 105 artisans of Kolhapuri crafted footwear manufacturing were evaluated in this study. The data collection was done through an interview and using Nordic musculoskeletal questionnaire. The work uses the Rapid Upper Limb Assessment (RULA) method for posture analysis. Multiple regression investigation was used to evaluate different risk factors linked with MSDs symptoms. It has been cleared that there are high occurrences of MSD pain between crafted footwear manufacturing artisans. The most frequently affected body areas were low back, neck, hips/thighs/buttocks, shoulder, elbows, hand and wrist, knees and upper back. The final RULA grand total of 6.1 specifies that artisans' posture needs to be change. The artisans who were associated with the manufacturing of Kolhapuri footwear had a high prevalence of musculoskeletal symptoms. Analysis of data suggests that the necessity of operational implementation program for handcrafted footwear manufacturing artisans.

Characterisation of retained energised fragments from explosive devices in military personnel

IntroductionCharacterising the shapes, dimensions and overall numbers of fragments produced by explosive devices is important for determining methods of potential mitigation, such as personal armour. The aim of this investigation...

Efficacy of ruxolitinib cream in vitiligo by patient characteristics and affected body areas: Descriptive subgroup analyses from a phase 2, randomized, double-blind trial

To the Editor: Vitiligo is a chronic autoimmune disease resulting in patches of depigmented skin1 and reduced quality of life.2 In a randomized, dose-ranging phase 2 study (NCT03099304) in 157 adult patients, the Janus kinase (JAK) 1/JAK2 inhibitor ruxolitinib cream produced substantial repigmentation of facial and total body vitiligo lesions after 24 weeks, with continued improvement through week 52, and was well tolerated.3 Here, we present treatment response subanalyses from the phase 2 trial.

Musculoskeletal Disorders among Italian Dentists and Dental Hygienists.

Dental professionals often perform physically and mentally demanding therapeutical procedures. They work maintaining muscular imbalance and asymmetrical positions for a long time. The aim of the study was to describe the prevalence and the factors associated to work-related musculoskeletal disorders (WMSD) among Italian dental professionals and the most affected body regions. A cross-sectional observational study was conducted between March 2019 and February 2020. The Nordic Musculoskeletal questionnaire (NMQ) was implemented with questions related to working habits (dental occupation, working hours per week and per days, years of work) and lifestyle (practiced physical activity, including frequency and duration, mobilization activities, and knowledge of ergonomic guidelines) was used. The-chi square test was carried out to detect any statistically significant difference (p < 0.05). Logistic regression was carried out to detect the most significant factors associated to WMSD occurrence. A total of 284 questionnaires have been used for the analysis. A high proportion of dental professionals (84.6%) were affected by WMSD in the last 12 months. A higher prevalence was found in females (87%) when compared to males (80%). The prevalence of WMSD was correlated to the working hours/day and hour/week, with a higher risk for operators working >5 h/day and >30 h/week. In addition, a high prevalence was found in operators working for 2–5 years after graduation. Most of the surveyed dental professionals practiced physical activity (70.1%) but only a few had satisfactorily knowledge of ergonomic guidelines (12.7%). Interestingly, participants who practiced yoga or stretching as physical activities demonstrated lower WMSD (77%) when compared to other physical activities (84%). We can highlight that generic physical activities have no functional effect on WMSD for dental professionals. The most affected body areas were neck (59.9%), shoulders (43.3%), lumbar region (52.1%), dorsal region (37.7%) and wrists (30.6%). Considering the magnitude of the problem, there is an urgent need to implement the education in ergonomics among dental professionals, that may be achieved by teaching biomechanics, posturology and integrative functional therapies (such as yoga) during the university education and by promoting holistic health of dental operators.

Prevalência das Lesões Músculo-Esqueléticas em Trabalhadores Industriais: uma Revisão Integrativa da Literatura

Introduction According to the World Health Organization, in 2017, musculoskeletal diseases were the major contributors to global disability. Considering the exercise of functions in a professional context as an essential component in the daily life of human beings, it is in this environment that many of these injuries arise. The serious economic, labour and social repercussions that this type of injuries can cause brings us to the importance of analysing the current prevalence of these events in several industries, as well as the most affected body areas. Methods A literature search was carried out in the Pubmed and Web of Science databases, of articles published after 2015. The keywords used were “employee”, “skeletal muscle”, “injuries” and “industry/ sector”. This research resulted in 132 articles, of which 37 were revised to the full text and assessed their quality, which allowed the selection of 15 articles for a consequent analysis. Results Among the various industries, the tanning industry was the one with the highest global prevalence of musculoskeletal injuries (89.1%), 94.5% in females and 85% in males. In general, the prevalence of this type of injury in workers from different industries was around 70%. In most of the industries analysed (such as food, construction and textiles), the back/ lumbar area was the area most described as the origin of these injuries, with the exception of the printing industry, which reported a higher prevalence at the shoulder level. However, the back was the least identified region in the printing industry, being replaced, in this case, by the shoulder region. Discussion / Conclusion In general, and according to the data obtained, industrial workers are affected by a prevalence of musculoskeletal injuries that can vary between about 55% and 90%. The most affected regions of the body include the back, followed by shoulders, lower limbs and neck. The female sex was shown to be the most susceptible gender to contract musculoskeletal injuries, with respect to industrial workers.

Instant Cup of Soup: Can Kids Safely Prepare and Carry?

Scalds are a common cause of burn injury in children. Instant soup and noodle products have been identified as a common cause of pediatric burn injuries, with both the preparation process and product packaging implicated as predisposing factors. A cohort of children was observed simulating the preparation of a cup of noodle soup to identify steps in the process in which injury was mostly likely to occur. Nineteen percent of participants spilled the simulated soup onto themselves, representing potential burn injuries had the liquid been hot. The upper extremity was the most commonly affected body area and spillage occurred most commonly while the participant was transporting the cup of simulated soup. Targeted caregiver education about the potential dangers to children from instant soup and noodle products and investigation into safer packaging are needed to decrease the risk of these injuries in children.

Hidradenitis supurativa. Descripción de los hallazgos ecográficos en un centro de referencia en Bogotá, Colombia

Introducción: el ultrasonido de alta resolucion de tejidos blandos es una herramienta util para la caracterización de los hallazgos de hidradenitis supurativa (HS). Se presenta una serie de 27 pacientes con diagnostico clinico de HS, en quienes se practico ultrasonido de alta resolucion. Objetivos: describir los hallazgos ecograficos mas frecuentes en pacientes con HS. Establecer el estadiaje de Hurley ecografico. Describir los hallazgos ecograficos no evidentes clinicamente de la enfermedad. Identificar la actividad inflamatoria de la HS mediante el uso del analisis Doppler. Métodos: es un estudio retrospectivo, descriptivo. Se realizo ecografia de alta resolucion por parte de una radióloga con experiencia en ecografia dermatologica. Se empleo un equipo TOSHIBA XARIO 200 con transductor lineal de alta resolucion de 18 a 22 MHz. El registro se llevo a en un reporte unificado creado para el estudio tomando como base el reporte sugerido por el grupo DERMUS, del cual la investigadora forma parte y ayudo a desarrollar. Para el analisis estadistico se emplearon medidas de tendencia central, descripcion de frecuencias y cruce de variables. Resultados: la edad promedio fue de 44,7 anos. El 74,1% de los pacientes fue mujeres. La zona corporal mas afectada fue las axilas (55,5%). El hallazgo ecografico mas comun fue la presencia de fistulas. Se encontro aumento de la vascularizacion al analisis Doppler en el 80% de las fistulas, lo que indica actividad inflamatoria. El estadio I de Hurley se encontro en el 37,04%. Conclusión: la ecografia evidencio fistulas ocultas en el 29,6% de los pacientes, que llevaron a modificar el estadiaje clinico de la enfermedad. La ecografia es un metodo importante para el correcto abordaje de los pacientes con HS.

Quality of Life and Characterization of Patients With Atopic Dermatitis in Portugal: TheQUADEP Study.

To investigate the quality of life (QOL) of and to characterize patients with atopic dermatitis (AD) in Portugal. This was a cross-sectional study of patients with AD and other eczemas. Skindex-29, Skindex-teen, and the Childhood Atopic Dermatitis Impact Scale (CADIS) were the instruments used to assess QOL in adults, teenagers, and children, respectively. The SF-12 was also used, and disease severity was evaluated using the Patient-Oriented SCORAD (PO-SCORAD) instrument. Associations with QOL were assessed based on the odds ratio (OR). P values <.05 and 95%CIs were considered statistically significant. The study population comprised 162 participants aged 0.5-74 years. We found that 37.3% of AD patients consider their disease disabling and that more than half of the patients feel stigmatized by society. The mean Skindex score for AD was 39.68, and the impact on QOL was severe in 44%. "Symptoms" was the most affected category in adults. AD was moderate to severe in 87% of the sample. One of the factors that most influenced poorer QOL in AD was age: with increasing age, the Skindex is likely to increase (OR, 1.03; 95%CI, 1.00-1.06). "Considering the disease a disability" was also associated (OR, 6.72; 95%CI, 2.56-17.63). QOL worsens with increasingly affected body area (OR, 1.07; 95%CI, 1.03-1.11) and the presence of edema (OR, 2.0; 95%CI, 1.23-3.40). This is the first study to provide data on QOL in patients with AD in Portugal. Our data show an expected negative impact. More awareness-raising activities are needed to increase knowledge, decrease stigmatization, and, consequently, address the factors involved in the QOL of patients with AD.

17752 Effects of ruxolitinib cream on affected body areas in patients with vitiligo: Subgroup analysis from a 52-week, randomized, double-blind trial

Ruxolitinib cream is a Janus kinase inhibitor under investigation for vitiligo treatment. Vitiligo lesion location affects repigmentation likelihood. Meta-analyses of phototherapy and topical calcineurin inhibitors for vitiligo demonstrated no evidence of marked (≥75%) repigmentation of hands/feet. This 52-week, randomized, double-blind, phase 2 study (NCT03099304) enrolled adult patients with vitiligo that included depigmentation ≥0.5% of body surface area (BSA) on the face and ≥3% of, BSA on nonfacial areas.

Machine learning techniques for mortality prediction in critical traumatic patients: anatomic and physiologic variables from the RETRAUCI study

BackgroundInterest in models for calculating the risk of death in traumatic patients admitted to ICUs remains high. These models use variables derived from the deviation of physiological parameters and/or the severity of anatomical lesions with respect to the affected body areas. Our objective is to create different predictive models of the mortality of critically traumatic patients using machine learning techniques.MethodsWe used 9625 records from the RETRAUCI database (National Trauma Registry of 52 Spanish ICUs in the period of 2015–2019). Hospital mortality was 12.6%. Data on demographic variables, affected anatomical areas and physiological repercussions were used. The Weka Platform was used, along with a ten-fold cross-validation for the construction of nine supervised algorithms: logistic regression binary (LR), neural network (NN), sequential minimal optimization (SMO), classification rules (JRip), classification trees (CT), Bayesian networks (BN), adaptive boosting (ADABOOST), bootstrap aggregating (BAGGING) and random forest (RFOREST). The performance of the models was evaluated by accuracy, specificity, precision, recall, F-measure, and AUC.ResultsIn all algorithms, the most important factors are those associated with traumatic brain injury (TBI) and organic failures. The LR finds thorax and limb injuries as independent protective factors of mortality. The CT generates 24 decision rules and uses those related to TBI as the first variables (range 2.0–81.6%). The JRip detects the eight rules with the highest risk of mortality (65.0–94.1%). The NN model uses a hidden layer of ten nodes, which requires 200 weights for its interpretation. The BN find the relationships between the different factors that identify different patient profiles. Models with the ensemble methodology (ADABOOST, BAGGING and RandomForest) do not have greater performance. All models obtain high values ​​in accuracy, specificity, and AUC, but obtain lower values ​​in recall. The greatest precision is achieved by the SMO model, and the BN obtains the best recall, F-measure, and AUC.ConclusionMachine learning techniques are useful for creating mortality classification models in critically traumatic patients. With clinical interpretation, the algorithms establish different patient profiles according to the relationship between the variables used, determine groups of patients with different evolutions, and alert clinicians to the presence of rules that indicate the greatest severity.

Mapping the Risk of Fracture of the Tibia From Penetrating Fragments.

Penetrating injuries are commonly inflicted in attacks with explosive devices. The extremities, and especially the leg, are the most commonly affected body areas, presenting high risk of infection, slow recovery, and threat of amputation. The aim of this study was to quantify the risk of fracture to the anteromedial, posterior, and lateral aspects of the tibia from a metal fragment-simulating projectile (FSP). A gas gun system and a 0.78-g cylindrical FSP were employed to perform tests on an ovine tibia model. The results from the animal study were subsequently scaled to obtain fracture-risk curves for the human tibia using the cortical thickness ratio. The thickness of the surrounding soft tissue was also taken into account when assessing fracture risk. The lateral cortex of the tibia was found to be most susceptible to fracture, whose impact velocity at 50% risk of EF1+, EF2+, EF3+, and EF4+ fracture types – according to the modified Winquist-Hansen classification – were 174, 190, 212, and 282 m/s, respectively. The findings of this study will be used to increase the fidelity of predictive models of projectile penetration.